Figures from mobile web developer Onswipe appears to confirm that the update was installed by 22% of all iOS users within 36 hours of its release.

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By the company's calculations, iOS 6 took a full week to reach 44% of the market when it was released last autumn.

The swifter adoption rate is partially attributed to users becoming more accustomed to the over-the-air update method introduced with iOS 5, according to TechCrunch.

iOS 6.1 is compatible with iPhone 5, iPhone 4S, iPhone 4, iPhone 3GS, iPad (third and fourth generation), iPad mini, iPad 2 and iPod touch (fourth and fifth generation), though some features may not be available on all these products.

New features introduced with the update include LTE (long-term evolution, marketed as 4G LTE) capabilities to 36 additional iPhone carriers and 23 additional iPad carriers and the option to book cinema tickets in the US using Siri.

Onswipe's research is based on a cross section of the iOS user base, with the company tracking 13 million active iPhone and iPad users.